A display medium driver includes a translucent display substrate, a rear substrate that is opposed to the display substrate with a gap interposed therebetween, a dispersion medium enclosed between the substrates, a first particle group dispersed in the dispersion medium so as to migrate by applying a first voltage across the substrates, and a second particle group dispersed in the dispersion medium so as to migrate by applying a second voltage across the substrates, the driver including a setting unit setting a voltage value and a voltage application time of the first voltage with which the first particle group does not migrate at the time of causing the second particle group to migrate depending on a display density of the second particle group and a voltage application unit first applying the first voltage across the substrates and then applying the second voltage across the substrates.
Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A display medium driver including a display substrate that has translucency, a rear substrate that is opposed to the display substrate with a gap interposed therebetween, a dispersion medium that is enclosed between the display substrate and the rear substrate, a first particle group that is dispersed in the dispersion medium and that migrates by applying a first voltage of which an absolute value is equal to or greater than a first threshold value across the substrates, and a second particle group that is dispersed in the dispersion medium and that migrates by applying a second voltage of which an absolute value is equal to or greater than a second threshold value less than the first threshold value across the substrates, the driver comprising: a setting unit that sets a voltage value and a voltage application time of the first voltage with which the first particle group does not migrate at the time of causing the second particle group to migrate depending on a display density of the second particle group when the second particle group is caused to migrate after the first particle group is caused to migrate; and a voltage application unit that first applies the first voltage set by the setting unit across the substrates and then applies the second voltage across the substrates by applying the first voltage across the substrates so that the first particle group migrates to one of the display substrate and the rear substrate and the second particle group migrates the other of the display substrate and the rear substrate, applying the first voltage, which is set by the setting unit and corresponds to the display density of the first particle group, across the substrates, and applying the second voltage, the absolute value of which is less than the first threshold value and equal to or greater than the second threshold value and which corresponds to the display density of the second particle group, across the substrates.
A display medium driver controls a display with two particle types in a liquid between transparent front and back substrates. The first particle type moves when a voltage exceeds a higher threshold; the second, at a lower threshold. The driver contains a setting unit that adjusts the first voltage's value and duration, based on the second particle type's desired density. This adjustment prevents the first particle type from moving while the second type is being positioned. A voltage application unit first applies the adjusted first voltage, ensuring only the second particle type moves to create the desired display density, and then applies the second voltage.
2. A non-transitory computer-readable medium storing a program causing a computer to function as the units of the driver according to claim 1 .
This describes a non-transitory computer-readable medium (like a flash drive or hard drive) storing a program. When executed by a computer, this program causes the computer to function as a display medium driver. The display medium driver controls a display with two particle types in a liquid between transparent front and back substrates. The first particle type moves when a voltage exceeds a higher threshold; the second, at a lower threshold. The driver contains a setting unit that adjusts the first voltage's value and duration, based on the second particle type's desired density, preventing the first particle type from moving while the second type is positioned. A voltage application unit applies the adjusted first voltage and then the second voltage.
3. A display medium driver including a display substrate that has translucency, a rear substrate that is opposed to the display substrate with a gap interposed therebetween, a dispersion medium that is enclosed between the display substrate and the rear substrate, a first particle group that is dispersed in the dispersion medium and that migrates by applying a first voltage of which an absolute value is equal to or greater than a first threshold value across the substrates, and a second particle group that is dispersed in the dispersion medium and that migrates by applying a second voltage of which an absolute value is equal to or greater than a second threshold value less than the first threshold value across the substrates, the driver comprising: a setting unit that (i) sets a voltage value and a voltage application time of the first voltage with which the first particle group does not migrate at the time of causing the second particle group to migrate depending on a display density of the second particle group when the second particle group is caused to migrate after the first particle group is caused to migrate, and (ii) fixes the voltage value of the first voltage and changes the voltage application time of the first voltage depending on the display density of the second particle group; and a voltage application unit that first applies the first voltage set by the setting unit across the substrates and then applies the second voltage across the substrates by applying the first voltage across the substrates so that the first particle group migrates to one of the display substrate and the rear substrate and the second particle group migrates to the other of the display substrate and the rear substrate, applying the first voltage, which is set by the setting unit and corresponds to a display density of the first particle group, across the substrates, and applying the second voltage, the absolute value of which is less than the first threshold value and equal to or greater than the second threshold value and which corresponds to the display density of the second particle group, across the substrates.
A display medium driver controls a display with two particle types in a liquid between transparent front and back substrates. The first particle type moves when a voltage exceeds a higher threshold; the second, at a lower threshold. The driver has a setting unit that (i) sets the first voltage's value and duration based on the second particle type's desired density (preventing the first particle type from moving while the second is positioned) and (ii) keeps the first voltage value constant but varies its application time based on the second particle type's target density. A voltage application unit first applies the adjusted first voltage and then applies the second voltage to control the particle movement.
4. A display device comprising: a display medium including a display substrate that has translucency, a rear substrate that is opposed to the display substrate with a gap interposed therebetween, a dispersion medium that is enclosed between the display substrate and the rear substrate, and a plurality of types of particle groups that are dispersed in the dispersion medium, that are enclosed between the substrates so that the particles groups migrate between the substrates depending on an electric field formed between the substrates, and that are different from each other in color and charged polarity; and a display driver including a setting unit that sets a voltage value and a voltage application time of the first voltage with which the first particle group does not migrate at the time of causing the second particle group to migrate depending on a display density of the second particle group when the second particle group is caused to migrate after the first particle group is caused to migrate, and a voltage application unit that first applies the first voltage set by the setting unit across the substrates and then applies the second voltage across the substrates.
A display device includes a display medium and a driver. The display medium has a transparent front substrate, a rear substrate, a liquid between them, and multiple particle groups with different colors and charges that move based on the electric field. The display driver contains a setting unit that adjusts the first voltage's value and duration, based on the second particle type's desired density. This adjustment prevents the first particle type from moving while the second type is being positioned. A voltage application unit first applies the adjusted first voltage, ensuring only the second particle type moves to create the desired display density, and then applies the second voltage.
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August 12, 2011
September 17, 2013
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